US1382914A - Amplifying system - Google Patents

Amplifying system Download PDF

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Publication number
US1382914A
US1382914A US380038A US38003820A US1382914A US 1382914 A US1382914 A US 1382914A US 380038 A US380038 A US 380038A US 38003820 A US38003820 A US 38003820A US 1382914 A US1382914 A US 1382914A
Authority
US
United States
Prior art keywords
input
circuit
amplifier
amplifiers
output
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US380038A
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English (en)
Inventor
Charles A Hoxie
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
General Electric Co
Original Assignee
General Electric Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by General Electric Co filed Critical General Electric Co
Priority to US380038A priority Critical patent/US1382914A/en
Priority to FR535253D priority patent/FR535253A/fr
Application granted granted Critical
Publication of US1382914A publication Critical patent/US1382914A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/08—Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K9/00—Screening of apparatus or components against electric or magnetic fields
    • H05K9/0064—Earth or grounding circuit

Definitions

  • My present invention relates to the amplification of electric currents of small intensity, and especially to the amplification of high frequency currents used for signaling purposes. More particularly, it relates to the use of electron discharge relays, detectors or amplifiers.
  • One of the objects of my present invention is to avoid the undesired production of oscillatory currents when such devices are used in cascade either as amplifiers or detectors, or to serve both functions.
  • Another object of my invention is to provide an amplifying system which will be highly selective, that is,
  • the amplifying system comprises three amplifying tubes 1, 2 and 3, which are preferably of the high vacuum or pliotron type. be understood that as many tubes as desired It will of course may be connected in cascade and that I have indicated three only as this is a sufiicient number for the explanation of my invention.
  • the cathodes of the amplifying tubes may all be supplied with heating current from a single source (not shown) connected to line conductors 4 and 5.
  • the plate or output circuits may all be supplied with current from another source (not shown) connected to line conductors 5 and 6.
  • the tubes 1, 2 and 3 with their'respective input circuits are inclosed in separate compartments of a metal box 7 which is grounded at 8 and the output circuits are inclosed in other separate compartments of the box.
  • the currents to be amplified are impressed upon the input circuit of tube 1 by means of a transformer 12.
  • the output circuit of tube 1 includes the primary 13 of a transformer 14:.
  • This transformer is preferably an iron core transformer with low distributed capacity between windings and the primary 13 may have a large number of turns and the high impedance desirable for use with tubes of the type indicated.
  • the transformers which I make use of are preferably made up of a plurality of pancake coils each consisting of not more than two or three layers and these coils are separated from one another by a distance greater than the thickness of the coils. Instead of providing a high impedance secondary also, however, I provide a secondary winding 15 of only a few turns so that the potentials set up in the secondary will be comparatively small.
  • Secondary 15 is connected to the primary 17 of transformer 18 by means of which the amplified currents from the output of tube 1 are impressed upon the input circuit of tube 2.
  • the primary 17 also consists of a few turns only while the secondary 19 is made up of a large number of turns and has a high impedance, as desired.
  • the coupling transformers 1st and 18 are inclosed in separate metal boxes-20 and 21, which are connected to the grounded box 7 These boxes should be made of great enough thickness to provide a complete electromagnetic shielding between the transformers. I thus provide a low potential connection fromthe output of one tube to the input of the next succeeding tube, and by the means described practically eliminate all electrostatic coupling between the successive stages.
  • Tube 1 for example, may be employed as radio frequency amplifier, tube 2 as radio frequency amplifier and detector, and tube 3 as audio frequency amplifier.
  • tube 3 By sharp audio tuning in the in-. put circuit of tube 3 the current in the output circuit which is supplied to the receivers 23 will be so free from radio components that even though there may be an appreciable coupling outside of the box 7 between the output of tube 3 and the input of tube 1 there will be no tendency for the system to oscillate.
  • transformers from the .30 have hereunto set 20. rimary in the output;

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)
US380038A 1920-05-10 1920-05-10 Amplifying system Expired - Lifetime US1382914A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US380038A US1382914A (en) 1920-05-10 1920-05-10 Amplifying system
FR535253D FR535253A (fr) 1920-05-10 1921-05-09 Perfectionnements aux systèmes amplificateurs

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US380038A US1382914A (en) 1920-05-10 1920-05-10 Amplifying system

Publications (1)

Publication Number Publication Date
US1382914A true US1382914A (en) 1921-06-28

Family

ID=23499655

Family Applications (1)

Application Number Title Priority Date Filing Date
US380038A Expired - Lifetime US1382914A (en) 1920-05-10 1920-05-10 Amplifying system

Country Status (2)

Country Link
US (1) US1382914A (fr)
FR (1) FR535253A (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2428013A (en) * 1942-06-30 1947-09-30 Louis H Crook Electron tube
US2453148A (en) * 1943-07-29 1948-11-09 Fred H Mccall Shield box and tuning mechanism for electron tubes
US2554717A (en) * 1946-01-26 1951-05-29 Honeywell Regulator Co Measuring and controlling apparatus
US2755386A (en) * 1952-04-09 1956-07-17 Standard Coil Prod Co Inc Tuner shield
US3217177A (en) * 1962-06-11 1965-11-09 Rca Corp Logic circuits
US20060148289A1 (en) * 2000-02-07 2006-07-06 Communication And Power Industries, Inc. Input circuit for vacuum electron device RF amplifier

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2428013A (en) * 1942-06-30 1947-09-30 Louis H Crook Electron tube
US2453148A (en) * 1943-07-29 1948-11-09 Fred H Mccall Shield box and tuning mechanism for electron tubes
US2554717A (en) * 1946-01-26 1951-05-29 Honeywell Regulator Co Measuring and controlling apparatus
US2755386A (en) * 1952-04-09 1956-07-17 Standard Coil Prod Co Inc Tuner shield
US3217177A (en) * 1962-06-11 1965-11-09 Rca Corp Logic circuits
US20060148289A1 (en) * 2000-02-07 2006-07-06 Communication And Power Industries, Inc. Input circuit for vacuum electron device RF amplifier
US20060148290A1 (en) * 2000-02-07 2006-07-06 Communication And Power Industries, Inc., A Delaware Corporation Input circuit for vacuum electron device RF amplifier
US20060154504A1 (en) * 2000-02-07 2006-07-13 Communication And Power Industries, Inc., A Delaware Corporation Input circuit for vacuum electron device RF amplifier
US7242135B2 (en) 2000-02-07 2007-07-10 Communication And Power Industries, Inc. High voltage connection for vacuum electron device
US7359206B2 (en) * 2000-02-07 2008-04-15 Communications And Power Industries, Inc. Radio frequency isolation system and cover assembly for vacuum electron device
US7384293B2 (en) 2000-02-07 2008-06-10 Communication And Power Industries, Inc. Breach lock mechanism for seating vacuum electron device

Also Published As

Publication number Publication date
FR535253A (fr) 1922-04-12

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